EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 193

MODULE EZ80F92 512K 20MHZ

EZ80F920120MOD

Manufacturer Part Number
EZ80F920120MOD
Description
MODULE EZ80F92 512K 20MHZ
Manufacturer
Zilog

Specifications of EZ80F920120MOD

Module/board Type
Development Module
Processor Series
EZ80F92x
Core
eZ80
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
1 MB
Interface Type
Cable
Maximum Clock Frequency
20 MHz
Operating Supply Voltage
0 V to 3.3 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
LQFP
Development Tools By Supplier
eZ80F920200ZCOG
Minimum Operating Temperature
0 C
For Use With/related Products
eZ80F92
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3157
EZ80F920120MOD
PS015308-0404
ZDI Bus Control Register
The ZDI Bus Control register controls bus requests during DEBUG mode. It enables or
disables bus acknowledge in ZDI DEBUG mode and allows ZDI to force assertion of the
BUSACK signal. This register should only be written during ZDI DEBUG mode (that is,
following a BREAK). See ZDI Bus Control Register (ZDI_BUS_CTL = 17h in the ZDI
Register Write Only Address Space).
Table 101. ZDI Bus Control Register
(ZDI_BUS_CTL = 17h in the ZDI Register Write Only Address Space)
Bit
Reset
CPU Access
Note: W = Write Only.
Bit Position
7
ZDI_BUSAK_EN
6
ZDI_BUSAK
[5:0]
Value
0
1
0
1
000000
P R E L I M I N A R Y
W
7
0
Description
Bus requests by external peripherals using the
BUSREQ pin are ignored. The bus acknowledge signal,
BUSACK, is not asserted in response to any bus
requests.
Bus requests by external peripherals using the
BUSREQ pin are accepted. A bus acknowledge occurs
at the end of the current ZDI operation. The bus
acknowledge is indicated by asserting the BUSACK pin
in response to a bus request.
Deassert the bus acknowledge pin (BUSACK) to return
control of the address and data buses back to ZDI.
Assert the bus acknowledge pin (BUSACK) to pass
control of the address and data buses to an external
peripheral.
Reserved.
W
6
0
W
5
0
W
4
0
W
3
0
Product Specification
W
ZiLOG Debug Interface
2
0
eZ80F92/eZ80F93
W
1
0
W
0
0
181

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